Improvement in double-acting pumps



UNITED STATES PATENT OFFICE.

BENJAMIN J. C. HOWE, 0F SYRACUSE, NEW YORK.

IMPROVEMENT IN DOUBLE-ACTING PUMPS.

Specification forming part of Letters Patent No. 42,773, dated May 17, 1864 antedated February 4, 1864.

letters indicate like parts in eachl of the figures.

Figure l is a longitudinal section of the working part of the pump. Fig. 2 is an elevation showing the aperture in the side of the hollow piston-rod or plunger, near the lower end. Fig. 3 is the cap which covers the ends of the cylinder.

a a is the hollow pistonrod. b b is the piston. c c are rings made fast to the pistonrod in such a manner as to allow a slight motion of the piston on the rod. d is the aperture inthe side of the piston-rod which connects with the chamber above the piston during the upward stroke and with the chamber below the piston in the downward stroke, and through which the water passes. c e are valves of ordinary construction, to admit and retain the water in the cylinder. f is a pin for fastening the lower ring to the piston-rod.

The nature of this improvement consists in providing the hollow piston-rod of a pump with one or more apertures in the side near the lower end, and of so attaching it to the piston that the apertures in the side of the hollow rod sha-ll connect with the chamber above the piston during the upward stroke and with the chamber below the piston during the downward stroke, thus producing a constant opening through the hollow piston-rod for the escape of the water while the pump is in action.

The object of the invention is to produce a cheaper and more effective article of use and trade, not only for the purpose of raising water for ordinary uses, but also by means of a sufficient length of conducting-hose to furnish a ready and eficient engine for extinguishing a fire.

The different parts of the pump are so constructed that most of the ordinary and expensive machine-work in fitting up iron castings can be dispensed with, thejoints being made water-tight by means of rubber or other packing. rlhis feature, in connection with the great simplicity of the pump, admits of its being sold at a cheaper rate than any other pump of so great power and capacity.

In using the pump it is made fast to a post in the bottom of the well and a suflicient amount of pipe attached to reach the surface. This pipe acts as piston-rod and conductor, and is worked by means of a lever attached to the post as a fulcrum.

The valves permit the water in the-pipe to fall to the level of the water in the well, thus avoiding the freezing of the waterin the pipe in cold weather, or its becoming warm in hot weather.

What I claim is- A hollow piston-rod having one or more apertures near the lower end, and attached to the piston in such a manner thatthe apertures in the side of the hollow piston-rod shall be open only to the compressed water on either side alternately of the piston as'it is moved backward and forward in the cylinder of the pump, substantially as described.

In witness whereof I have hereunto set my hand and seal this 28th day of January, 186i.

BENJAMIN J. C. HOWE. [L.S.]

Witnesses J. B. GAYLORD, WILLIs S. BARNUM. 

